具有連接作用的副詞
besides 此外
I am too tired to go; besides, it's too late.
我很累不能去，此外，天色也晚了。
hence 因此
My mother is by herself; hence I must go home now.
我媽媽獨(dú)自一人在家，因此我現(xiàn)在必須回去了。
meanwhile 與此同時
Mother went shopping; meanwhile I cleaned the house.
母親去購物，與此同時我打掃房間。
moreover 此外
Bicycling is good exercise; moreover, it won't pollute the air.
騎自行車是一種很好的運(yùn)動，此外，還不污染空氣。
then 此外，還有
I was there; then there were my mother and father.
我在那兒，此外，我的爸爸媽媽也在那兒。
therefore 因此
I think; therefore I am.
我思故我在。
thus 因此
It's late, and thus you must go.
天晚了，因此你必須走。
下面來看幾個連接副詞在作副詞和連詞時的區(qū)別：
However
however 作副詞時，可位于形容詞/副詞之前：
You couldn't earn much, however hard you worked.
無論你干得多賣力，你都掙不了多少錢。
however 作連詞時通常意為“但是”，可位于它所引導(dǎo)的從句之前或之后，或位于第一個詞或短語之后：
I'll offer it to Tom. However, he may not want it. / He may not want it however. / Tom, however, may not want it.
我將提出把這個給湯姆，然而他可能不要它。
但提到兩句意義相反的話時， however意為“但是/仍然/同樣”：
They hadn't trained hard, however ( / but / nevertheless / all the same) they won.
他們并沒有刻苦訓(xùn)練，但/無論如何/仍然/同樣獲勝了。
Otherwise
otherwise 作為副詞時常常位于動詞之后：
It must be used in a well-ventilated room. Used otherwise it could be harmful.
必須在通風(fēng)條件好的房間里使用。如不這樣使用則可能是有害的。
otherwise 作連詞時意為“要是不/否則”：
We must be early; otherwise we won't get a seat.
我們得早點(diǎn)去，否則我們就沒有座位了。
在英語口語中，這里也可用or：
We must be early or(else)we won't get a seat.
我們得早點(diǎn)去，否則我們就沒有座位了。
So
so 作程度副詞，位于形容詞/副詞之前：
It was so hot that...
天氣太熱了，因而……
They ran so fast that...
他們騎得太快了，因而……
so 作連詞時位于它所引導(dǎo)的從句之前：
Our cases were heavy, so we took a taxi.
我們的箱子太重了，所以我們要了輛出租車。
Still & Yet
still 和 yet 可作時間副詞：
The children are still up. They haven't had supper yet.
孩子們還沒上床睡覺/醒著。他們還沒吃晚飯呢。
still 和 yet 作連詞時位于它們所引導(dǎo)的從句之前。still 意為“雖承認(rèn)某事/盡管如此”;yet 意為“不管，不顧/同樣/盡管如此”。
It's raining; still I'd like to go.
天下著雨，盡管如此，我還是要去的。
They are ugly and expensive; yet people buy them.
它們既難看又昂貴，但人們還是買。